Chemical preparation that is sprayed onto road surfaces and other surfaces, through the use of a stencil, to create safety warnings cautioning about wet surfaces, said warnings being visible only when the chemical reacts to water or moisture when the surface is wet and vanishes when the surface dries

'caution':22 'chemic':1,33 'creat':19 'dri':49 'moistur':38 'onto':6 'prepar':2 'react':34 'road':7 'safeti':20 'said':26 'spray':5 'stencil':17 'surfac':8,11,25,41,48 'use':14 'vanish':45 'visibl':29 'warn':21,27 'water':36 'wet':24,43

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